Stone-cutting machine.



' No. 852,562; l PATENTND MAY 7, l1907.

A. P. JoNEs. STONE CUTTING MACHINE.

APPLICATION FILED JULYZ?, 1905.

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' PATENTED MAY 7, 1907.

No. 852,562. A. T. JONES.

STONE CUTTING MACHINE.

APPLUATION FILED JULYZ'I, 1905. v

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UNITED STATES Parana? cierren..

STONE-CUTTING MACHINE.

Speccatonpf Letters Patent.

Patented May 7, 190'?.

Application led July 27, 1905. Serial No. 271,557-

lTo all LU/"1,0111, t 'Hetty con/cern:

Be it known that I, ALBERT F. JONES, of Salem, county of Essex, State of Massachusetts7 have invented an Improvement in Stone-Cutting Machines, of which the following description, in connection with the accompanying drawings, is a speciiication, like characters on the drawings representing like parts.

This invention relates to stone-cutting machines, especially designed for peening the surface of a stone, and has for its object to provide means for cutting lines in the surface of a stone at regular distances apart, and for cutting other lines therein, also at regular distances apart, which cross the aforesaid lines and for chipping oill the numerous imcut portions between said lines, to thereby produce a level surface.

In carrying out my invention two tools are usually employed, such for instance, as straight edged peening tools, and these are arranged to move in the same path over the stone, one following the other, and one of said tools is disposed obliquely to the path of movement and the other tool is disposed at an angle, as for instance a right angle, to the aforesaid tool. Means are provided for moving the tools over the surface of the stone so that when operated the lines cut by them will be at regular distances apart, and means are also provided for operating the tools, preferably simultaneously,l although they may be otherwise operated.

Figure 1 shows in front elevation a suflicient portion of a stone-cutting machine embodying my invention to illustrate the same. Fig. 2 shows in side elevation the tools and tool-holder, by which my invention may be carried out. Fig. 3 is a front elevation of the tools and tool-holder shown in Fig. 2. Fig. 4 is a sectional plan view taken on the dotted line 4 4, Fig. 2, showing particularly the actuating means for the tools. Fig. 5 is a transverse section of the two tools which I may employ, taken on the dotted line 5 5, Fig. 3, showing particularly their relative position to each other. Fig. 6, is a side elevation of the tools and tool-holder having modiiied means for operating the tools. Fig. 7 is a plan view of a portion of a stone having lines thereon to represent the lines which will be cut by the tools.

0 a, represents two peening tools, made as straight edged blades, which are bolted or otherwisemsecured to the lower end a of a tool-holder, of any suitable construction, the shank a2 of which is movable in a suitable bearing which supports and guides it. My invention, however, is not limited to the employment of peening tools, as contrasted to other tools, nor to securing the tools to the same tool-holder. However the blades or tools may be constructed and supported, they will be arranged at an angle, preferably a right angle, to each other as shown in Fig. 5.

The tools a, a, are herein shown as operated simultaneously to act upon and cut lines in the surface of the stone, and while my invention includes any suitable means for operating the tools, the means herein shown for the sake of illustration consists of a lug c extended from the shank a2 of the tool-holder, which is engaged by the bifurcated end of an arm c', pivoted at c2, and to a hub on said arm, a short arm cLi is secured which is engaged. by a rotating cam c5 secured to a shaft c adapted to be driven by any suitable mechanism. As the cam revolves the arm c will be repeatedly operated to positively raise the tool-holder and permit it to fall, thereby operating the tools by moving them out-of and into engagement with the stone.

The tool-holder will be supported by a tool-carriage A having rollers p3, which run on tracks on the horizontal portion B of a main frame, and the main frame is provided with end supports B, B', bearing rollers s which run on tracks s. As the tool-carriage is moved along by any suitable means which may be provided for the purpose, the toolholder will be moved over the stone, so that as it is reciprocated the tools will be operated to cut lines in the stone at regular distances apart, and both tools a, a, will be moved in the same path, and as they are arranged at right angles to each other or thereabout, the lines cut by them will cross each other.

In practice, as one of the tools cuts lines crosswise the lines previously cut by the other tool, the lnumerous small uncut portions4 between the lines will be chipped o'l'l'.

As my present invention relates particularly to the relative arrangement of the tools and to means for moving them in the same path, and to means for operating them, I have not deemed it necessary to illustrate, in detail, the specific construction of the machine which may be employed, hence I have only shown so much thereof as Ifdeem sufficient to illustrate the invention.

IIO

which is secured to the upper end of the shank a2, and which en ages the top of the frame bearing the too -holder. For simplicity of construction the two peening tools are operated simultaneously, but it is obvious that the results accomplished by their simultaneous operation can be obtained by their alternate operation.

Other means may be employed in lieu of the means above described for operating the tools, as for instance, the upper end oi' the shank of the tool-holder may have a piston a3 contained in a cylinder b and adapted to be operated in any usual manner to reciprocate the tool-holder.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a stone cutting machine, a tool holder, two peening tools borne by it which are disposed at right angles to each other, means for moving them over the stone in the same ath and means for operating them to cut ines in the stone which cross each other and to chip off the uncut portions between said interseoted lines, substantially as described.

2. In a stone cutting machine, a tool holder, two tools borne by it movable in the same path over the stone, one of which is disposed obliqueiy to said path of movement and the other is disposed at an angle to the aforesaid tool, means for moving said tools over the stone and means for operating said tools to cut lines therein which cross eachother andy ALBERT F. JONES. Witnesses:

A R. J. NoYEs, II. B. DAVIS. 

